TRIR & TRFR Calculator: Total Recordable Incident Rate (2026)
TRIR (total recordable incident rate) is the number of OSHA-recordable injuries and illnesses per 100 full-time workers per year: TRIR = (recordable cases × 200,000) ÷ total hours worked, where recordable cases are OSHA Form 300A columns H + I + J. Outside the US the same measure is usually reported as TRFR (total recordable frequency rate) per 1,000,000 hours, which is five times the TRIR. The DART rate counts only cases with days away, job restriction or transfer (columns H + I), and the lost time incident rate (LTIR) only cases with days away from work (column H).
Benchmarks: U.S. Bureau of Labor Statistics, 2024 survey · Runs in your browser — nothing you enter is sent or stored
Enter the hours worked to see your TRIR, DART and LTIR next to the 2024 BLS averages.
What is TRIR?
TRIR, the Total Recordable Incident Rate, is the number of OSHA-recordable work injuries and illnesses per 100 full-time workers in a year. It's the standard US safety benchmark used by OSHA, the Bureau of Labor Statistics, insurers and general contractors; per 1,000,000 hours it's called TRFR.
How to Calculate TRIR?
To calculate TRIR, multiply OSHA-recordable injuries and illnesses by 200,000, then divide by the total hours worked by all employees in the same period. The 200,000 represents 100 full-time employees working 40 hours a week for 50 weeks. Example: 3 cases × 200,000 ÷ 240,000 hours = 2.5.
TRIR = recordable cases (Form 300A columns H + I + J) × 200,000 ÷ total hours worked
- Count your recordable cases. On your OSHA 300A summary, add columns H (days away from work), I (job transfer or restriction) and J (other recordable cases). Each case sits in one column only.
- Get total hours worked by all employees in the same period, from payroll. Leave out paid time off — vacation, sick leave, holidays.
- Apply the formula: TRIR = recordable cases × 200,000 ÷ hours worked.
Worked example
120 employees work 240,000 hours in a year and log 1 days-away case (H), 1 restricted-duty case (I) and 1 other recordable case (J):
- TRIR = 3 × 200,000 ÷ 240,000 = 2.50
- DART = 2 × 200,000 ÷ 240,000 = 1.67
- LTIR = 1 × 200,000 ÷ 240,000 = 0.83
Against the 2024 construction averages (2.2, 1.3 and 0.9), that's a little high on TRIR and DART and just under on lost time.
How to Calculate DART Rate?
To calculate the DART rate, add the cases with days away from work and those with restricted duty or job transfer (Form 300A columns H + I), multiply by 200,000 and divide by total hours worked. DART covers the more serious part of TRIR, so it never exceeds TRIR.
DART rate = (days-away cases + restricted or transfer cases) × 200,000 ÷ total hours worked
What Does TRFR Mean?
TRFR, the Total Recordable Frequency Rate (also written TRIFR), is the international form of TRIR: the same recordable cases per 1,000,000 hours worked instead of per 200,000. For the same injury record it's five times the TRIR, so a TRIR of 2.0 equals a TRFR of 10.0.
TRFR = recordable cases × 1,000,000 ÷ total hours worked = TRIR × 5
Australia, the United Kingdom and many multinational and energy-sector employers report TRFR (or TRIFR), while OSHA, the BLS and US customers use TRIR. The calculator above shows both from the same inputs. Definitions of a recordable case can differ outside OSHA, so check which rules a TRFR was built on before comparing it with a US figure.
Where the 200,000 comes from
200,000 is the hours 100 full-time employees work in a year: 100 employees × 40 hours × 50 weeks. Multiplying by it converts a raw case count into a rate per 100 full-time workers, which is what lets a 25-person crew compare itself with a 2,500-person company — and with the national averages the Bureau of Labor Statistics publishes every year.
TRIR vs. DART vs. LTIR
All three use the same formula and the same hours; they differ only in which cases they count, from the broadest to the most serious:
| Rate | Form 300A columns | Counts |
|---|---|---|
| TRIRTotal recordable incident rate | H + I + J | Every nonfatal recordable case |
| DARTDays away, restricted or transferred rate | H + I | Cases with days away, job restriction or transfer |
| LTIRLost time incident rate | H | Cases with days away from work only |
Column G (deaths) isn't in any of the three: the BLS rates used as benchmarks cover nonfatal cases only, with fatalities counted in a separate census.
What is a lost time accident?
A lost time accident — or lost time injury — is a work-related injury or illness that keeps the employee away from work for at least one full day after the day it happened. On the OSHA 300 log those are the column H cases, and the day of the injury itself doesn't count toward the days away (29 CFR 1904.7(b)(3)). Your LTIR is the rate of those cases per 200,000 hours.
How to calculate a monthly or quarterly incident rate
Use the same formula with that period's cases and that period's hours — and keep the 200,000. It already scales the result to a full-time year, so a monthly TRIR is directly comparable with an annual one. What changes is the noise: a 40-person company works about 6,700 hours a month, so a single recordable case puts its monthly TRIR near 30. Track short periods for early warning, and a rolling 12 months for the number you report.
OSHA recordable vs. reportable
Recordable means it goes on your OSHA 300 log: a work-related injury or illness resulting in death, days away from work, restricted work or job transfer, medical treatment beyond first aid, loss of consciousness, or a significant injury or illness diagnosed by a licensed health care professional (29 CFR 1904.7). Apart from deaths (column G), these are the cases the rates on this page count.
Not sure if an incident counts toward your total? Verify it with our OSHA recordable injury checker before logging your TRIR.
Reportable means you must also tell OSHA directly: a work-related fatality within 8 hours, and an in-patient hospitalization, amputation or loss of an eye within 24 hours (29 CFR 1904.39). Most recordable cases are never reportable — and if you keep OSHA records, a reportable case goes on the log too.
What is a Good TRIR Score?
OSHA sets no pass mark: a good TRIR is at or below the Bureau of Labor Statistics average for your industry, and falling. In 2024 that average was 2.3 for all private industry, 2.2 for construction, 2.7 for manufacturing and 4.8 for warehousing. Many customers also set their own maximum for contractors.
2024 Bureau of Labor Statistics rates per 100 full-time workers, private industry — compare your result with your own industry's row:
| Industry (NAICS) | TRIR | DART | Days away |
|---|---|---|---|
| All private industry | 2.3 | 1.4 | 0.8 |
| Construction (23) | 2.2 | 1.3 | 0.9 |
| Specialty trade contractors (238) | 2.3 | 1.4 | 1.0 |
| Manufacturing (31-33) | 2.7 | 1.7 | 0.8 |
| Retail trade (44-45) | 3.0 | 1.8 | 1.0 |
| Transportation and warehousing (48-49) | 4.4 | 3.5 | 2.1 |
| Truck transportation (484) | 2.9 | 2.2 | 1.6 |
| Warehousing and storage (493) | 4.8 | 4.1 | 1.5 |
| Investigation and security services (5616) | 1.5 | 1.0 | 0.7 |
| Security guards and patrol services (561612) | 1.4 | 0.9 | 0.7 |
| Health care and social assistance (62) | 3.4 | 1.7 | 1.1 |
| Hospitals (622) | 5.1 | 2.1 | 1.3 |
| Nursing and residential care facilities (623) | 5.5 | 3.6 | 2.4 |
| Child day care services (6244) | 1.9 | 1.2 | 0.8 |
| Accommodation and food services (72) | 2.6 | 1.2 | 0.8 |
| Accommodation (hotels, motels) (721) | 3.8 | 2.3 | 1.2 |
| Restaurants, bars and food service (722) | 2.4 | 1.0 | 0.7 |
Source: BLS Survey of Occupational Injuries and Illnesses, 2024, Table 1. Customers and general contractors that prequalify vendors often ask for three years of TRIR and DART, alongside your workers' comp experience mod — see what yours costs with the workers' comp cost and EMR calculator.
Frequently asked questions
Where does the 200,000 in the TRIR formula come from?
It's the hours 100 full-time employees work in a year: 100 employees × 40 hours a week × 50 weeks. Multiplying by 200,000 turns your raw count into a rate per 100 full-time workers, so a 20-person company and a 2,000-person company can be compared on the same scale.
Is TRFR exactly the same as TRIR?
It measures the same thing on a different scale: TRFR uses 1,000,000 hours, TRIR 200,000, so divide a TRFR by 5 to compare it with US figures. Definitions of a recordable case can also differ outside OSHA — some international schemes count fatalities or apply their own medical-treatment rules — so check the definition before comparing numbers across countries.
What is LTIR?
LTIR, the lost time incident rate, counts only cases where the employee missed work: Form 300A column H × 200,000 ÷ hours worked. BLS publishes the same figure as the rate of cases with days away from work. Some companies also count fatalities as lost time cases, and outside the US the related LTIFR is usually expressed per 1,000,000 hours, so check which definition a customer is asking for.
What is a lost time accident?
A lost time accident (or lost time injury) is a work-related injury or illness that keeps the employee away from work for at least one full day after the day it happened. Under OSHA recordkeeping these are the cases logged in column H, days away from work; the day of the injury itself isn't counted (29 CFR 1904.7(b)(3)).
How do you calculate a monthly OSHA incident rate?
Use exactly the same formula with that month's recordable cases and that month's hours worked: cases × 200,000 ÷ hours. Don't change the 200,000 — it already scales the result to a full-time year, so a monthly rate compares directly with annual benchmarks. Because one case moves a small-period rate a lot, many safety teams also track a rolling 12-month rate.
What's the difference between an OSHA recordable and a reportable injury?
A recordable case goes on your OSHA 300 log: a work-related injury or illness that causes death, days away from work, restricted work or transfer, medical treatment beyond first aid, loss of consciousness, or a significant diagnosed injury or illness (29 CFR 1904.7). A reportable case is one you must also report to OSHA directly: a work-related fatality within 8 hours, and an in-patient hospitalization, amputation or loss of an eye within 24 hours (29 CFR 1904.39). Most recordable cases are never reportable.
What is the purpose of the OSHA 300 log?
The OSHA 300 log is the running, case-by-case record of every recordable work-related injury and illness at an establishment. It lets employers, employees and OSHA see where and how people get hurt, and it's the source for the annual 300A summary — and for the TRIR, DART and LTIR on this page.
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Keep reading
Sources
- BLS — Incidence rates by industry and case type, 2024 (Table 1)
- BLS — How to compute nonfatal incidence rates
- 29 CFR 1904.7 — General recording criteria
- 29 CFR 1904.39 — Reporting fatalities, hospitalizations, amputations and losses of an eye
Last reviewed 2026-10-03. A calculation aid, not legal advice — IncidentLog is not affiliated with OSHA or the U.S. Department of Labor.